We have been having an intermittent problem with one of our M1019a. The unit will show a wave form, but not display an EtCO2 value. The value seems to drop in and out randomly. If we change the water trap, this seems to help for a few minutes, but does not solve the problem. We also loose our other gas measurements (inhalent etc) when this happens. The waveform does not change throughout and seems accurate. RE: Philips - M1019A
the unit will be in the range it is allow most of the time but will rise to 3+ points out of range every few seconds then back down to an allowed range.
